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  • Q1: To generate control points between a pair of images, select them for display in the Control Points tab and then go to the Control Points menu and select Generate control points for image x and image y. You can also select a number of images on the Source Images tab or Image Parameters tab and use the Control Points menu option Generate control points for selected images...
    j.houghton@... Nov 7, 2014
  • I didn't take any particular action over the stairs. I did my usual workflow when presented with "these images won't stitch - I've tried everything". In brief: I load in the images and input all the information I have about the project on the Lens Details and Image parameters tab. I set the image parameters (y,p,r) to their nominal known positions - either manually (using fill yaw...
    j.houghton@... Nov 6, 2014
  • Having now checked the images, there is a small amount of both horizontal and vertical parallax visible, This needs to be checked with something really close to the camera set against a background really far away. Using two objects indoors doesn't work as well since both objects are then relatively near to the camera and both are affected by parallax. My tutorial that Willy...
    j.houghton@... Nov 6, 2014
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  • Thank you for uploading the images. They stitched quite well, actually. My project file can be found here: http://ge.tt/1te1lh32/v/0?c . It's past my bedtime so I'm not inclined to work on the project any further just now. There might be the odd glitch to sort out, but it doesn't look too bad. John
    j.houghton@... Nov 5, 2014
  • It's difficult to say whether slight rotation of the vertical arm might significantly affect the stitching errors. I'm sure we would be able to get a better understanding of the source of your problems if you could make available the complete set of images (half size jpegs would be fine, preferably grouped together in a zip or rar file). If you could upload them to some convenient...
    j.houghton@... Nov 5, 2014
  • Further to Willy's good advice, check that auto focus is not set on the camera. Otherwise you may get lens fov variations that can affect the alignment in PTGui. John
    j.houghton@... Nov 5, 2014
  • I don't know if you are taking into account refraction of the light rays by the earth's atmosphere, but this bending of the light becomes significant down towards the horizon. John
    j.houghton@... Oct 29, 2014
  • I wrote a tutorial describing a technique for calibrating a lens which is essentially the same as what you are attempting to do. See:http://www.johnhpanos.com/starcal.htm . I used PTGui, but I have converted a sample PTGui project file into a Hugin project and uploaded it to: http://ge.tt/24F3sn22/v/0?c . This will generate a 360x180 version of a remapped 50mm camera image aligned...
    j.houghton@... Oct 27, 2014
  • Alan, If you confine your control points on the horizontal row of images to features in the far distance where parallax is nil, you will get perfect stitching at the horizon. You may then have to accept minor parallax problems to deal with in the near features, but these can be dealt with using masks and/or automatically with Smartblend. John
    j.houghton@... Aug 31, 2014
  • Recommended shooting angles for a variety of lenses can be found in the lens database at http://www.vrwave.com/ . The Quick Start Guide there also has links to the Panorama Tools Wiki and tutorials, where there is a lot of useful advice and guidance. John
    j.houghton@... Jun 16, 2014